- #1
Dmitry67
- 2,567
- 1
In Stress Energy Tensor the following components make sense to me:
Energy density,
Momentum Density,
Energy flux
because they are based on the 'observables'
Whats about the Pressure? What is it (microscopically)?
On the microscopic level there are 'particles' flying in different directions.
Take one example: photon gas. I don't see any 'pressure'. I just see photons flying around...
Energy density,
Momentum Density,
Energy flux
because they are based on the 'observables'
Whats about the Pressure? What is it (microscopically)?
On the microscopic level there are 'particles' flying in different directions.
Take one example: photon gas. I don't see any 'pressure'. I just see photons flying around...